lib/binary-source-file.cc

   1 /*
   2   binary-source-file.cc -- implement Binary_source_file
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c)  1997--2000 Jan Nieuwenhuizen
   7 */
   8
   9
  10 #include <limits.h>             // INT_MAX
  11 #include <assert.h>
  12
  13 #include "proto.hh"
  14 #include "string.hh"
  15 #include "source-file.hh"
  16 #include "binary-source-file.hh"
  17 #include "string-convert.hh"
  18
  19 Binary_source_file::Binary_source_file (String& filename_str)
  20   : Source_file (filename_str)
  21 {
  22 }
  23
  24 Binary_source_file::~Binary_source_file ()
  25 {
  26 }
  27
  28 String
  29 Binary_source_file::error_str (char const* pos_ch_C) const
  30 {
  31   assert (this);
  32   if (!in_b (pos_ch_C))
  33     return "";
  34
  35   char const* begin_ch_C = pos_ch_C - 8 >? ch_C ();
  36   char const* end_ch_C = pos_ch_C + 7 <? ch_C () + length_i ();
  37
  38   String pre_str ((Byte const*)begin_ch_C, pos_ch_C - begin_ch_C);
  39   pre_str = String_convert::bin2hex_str (pre_str);
  40   for (int i = 2; i < pre_str.length_i (); i += 3)
  41     pre_str = pre_str.left_str (i) + " " + pre_str.cut_str (i, INT_MAX);
  42   String post_str ((Byte const*)pos_ch_C, end_ch_C - pos_ch_C);
  43   post_str = String_convert::bin2hex_str (post_str);
  44   for (int i = 2; i < post_str.length_i (); i += 3)
  45     post_str = post_str.left_str (i) + " " + post_str.cut_str (i, INT_MAX);
  46
  47   String str = pre_str
  48     + to_str ('\n')
  49     + to_str (' ', pre_str.length_i () + 1)
  50     + post_str;
  51   return str;
  52 }
  53
  54 int
  55 Binary_source_file::line_i (char const* pos_ch_C) const
  56 {
  57   if (!in_b (pos_ch_C))
  58     return 0;
  59
  60   return pos_ch_C - ch_C ();
  61 }
  62
  63 U8
  64 Binary_source_file::get_U8 ()
  65 {
  66   return *(U8*)forward_ch_C (1);
  67 }
  68
  69
  70 U16
  71 Binary_source_file::get_U16 ()
  72 {
  73   U16 b;
  74
  75   b = get_U8 () << 8;
  76   b |= get_U8 ();
  77
  78   return b;
  79 }
  80
  81
  82 U32
  83 Binary_source_file::get_U32()
  84 {
  85   U32 b;
  86
  87   b = get_U8 () << 24;
  88   b |= get_U8 () << 16;
  89   b |= get_U8 () << 8;
  90   b |= get_U8 ();
  91
  92   return b;
  93 }
  94
  95